[Retros] About T.Orban problem; Yefim's letter 01/12/2005

Nicolas.Dupont at math.univ-lille1.fr Nicolas.Dupont at math.univ-lille1.fr
Thu Jan 13 17:02:04 EST 2005

> More interesting: Several solutions in N halfmoves, -no- solutions in N+1

> halfmoves, and 1 solution for N+2 halfmoves.

It is enough to begin by 1.d3 to avoid solutions in N+1 half moves
(pointed by Ryan).


4 solutions in 3 moves, 0 solutions in 3,5 moves, 1 solution in 4 moves.


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